Angle properties of Triangles – GeoGebra

The Triangle – GeoGebra

The fact that the sum of angles in a triangle is 180°, illustrated in

Investigation 1: Inscribed Angle Properties – GeoGebra

Exterior Angle of a Triangle – GeoGebra

Triangle Construction – GeoGebra

Properties of an Isosceles Triangle – GeoGebra

EXTERIOR ANGLE PROPERTY OF A TRIANGLE – GeoGebra

PROPERTIES OF ANGLES IN CIRCLES – GeoGebra

angles in a triangle (zoom) – GeoGebra

Angle Properties of Polygons – GeoGebra